Class
Rack::URLMap
<
Object

Rack::URLMap takes a hash mapping urls or paths
to apps, and dispatches accordingly. Support for HTTP/1.1 host names
exists if the URLs start with http:// or
https://.

URLMap modifies the SCRIPT_NAME and PATH_INFO
such that the part relevant for dispatch is in the SCRIPT_NAME, and the
rest in the PATH_INFO. This should be taken care of when you need to
reconstruct the URL in order to create links.

URLMap dispatches in such a way that the longest
paths are tried first, since they are most specific.